package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

public class JDBCDemo3 {
    public static void main(String[] args) throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection(
                //数据库地址格式:jdbc:mysql://数据库IP:端口/数据库名?一堆参数
                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",//数据库用户名
                "root"//数据库密码
        );
        Statement statement = connection.createStatement();
        String sql = "UPDATE userinfo " +
                "SET nickname='哈哈' " +
                "WHERE Username='dad'";
        int num = statement.executeUpdate(sql);
        if (num>0){
            System.out.println("修改成功");
        }else {
            System.out.println("修改失败");
        }
    }
}
